The year is 1981. A secret lab just finished the most powerful weapon ever created, a chemical product called Compound-Z, capable of mutating a human body – alive or even dead – into mindless warriors, killed only by having their brains destroyed. Soon after, a huge container of C-Z was stolen by a terrorist paramilitary organization, and that started a war that involved the whole Earth.
C-Z was released in the athmosphere, contaminating 80% of the population, turning them into Zombies, as they were usually called by the remaining 20%, now living underground or behind fortified walls. From the remains of human kind, groups of survivors, called “Raiders” decided to surface and fight the zombies, to clean the earth from this menace and reclaim the planet for the living. For that, they must collect resources, scavenge cities, organize groups, clans, create forts and wipe away the zombie menace forever. They can count on the Antidote-Z, a rare and valuable potion that can revert the C-Z effect on humans.